PersistentDataModel, etc.: Lazy token copying.

TokenAddress needs a writable copy of the token in order to do input. Rather than making the copy when the TokenAddress is created, defer it until we're actually doing the read. This can speed up some analysis use cases where only a small fraction of the data is read.

This merge request affects 5 packages:

• Database/AthenaPOOL/AthenaPoolCnvSvc
• Database/AthenaPOOL/EventSelectorAthenaPool
• Database/PersistentDataModel
• Database/PersistentDataModelAthenaPool
• Database/TPTools

Affected files list will not be printed in this case

Adding @gemmeren ,@amete ,@tadej ,@mnowak ,@maszyman ,@ssnyder as watchers

added Database main review-pending-level-1 labels

CI Result SUCCESS (hash f6ac4c1e)

	Athena	AthSimulation	AthGeneration	AthAnalysis
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
For experts only: Jenkins output (remote access info)

Changes are fine and CI succeeds, approving for L1. -L1

added review-approved label and removed review-pending-level-1 label

mentioned in commit 746dcc00

merged